Web videos playing through default launcher.

[mostu]

Hello, I have a problem with my Samsung Galaxy Y. When I want to watch a movie on a website, either through stock browser or Dolphin, I'm not getting the prompt to choose from any of my 3 players. The video just launches through the default media player and I'm getting the "Sorry, video cannot be played" message. However, on few sites I'm getting the prompt to choose the player, but not on this specified one that I care about the most (sadistic.pl, Polish humorous site). Some movies from that site just open through the stock player, but others not. I would really appreciate any help. What I tried to do was resetting the default settings for all programs etc, but nothing helped. I suppose that I can't view videos on that certain site because it's made in Flash. But... Dolphin has flash in it doesn't it? I also tried Skyfire, but it doesn't seem to work either. Does anyone know how to solve this?